Piston-ring remover



I. M. LAWRENCE.

PISTON RING REMOVER. 'APFLICAIIQN FILED FEB, 2. 1921.

1,409,956. Patented Mar. 21,1922.

jag/- UNITED. STATES P AT ENT 2 o FF 5 LEONARD W. DAUTHADAY, OFBALTIMORE, MARYLAND.

PISTON-RING amtovnm Application filed February 2, 1921.

To all whom it may concern Be it known that I, JOHN M. LAWRENCE, acitizen of the United States, residing at Baltimore, in the State ofMaryland, have invented certain new and useful Improvements inPiston-Ring Removers; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled inthe art to which it appertains to make and use thesame.

My invention relates to a piston ring remover.

Heretofore, piston rings have usually been removed by prying out theends of the rings sufliciently far from the groove to permit of theinsertion of strips of metal between the rings and the body of thepiston. These strips, usually three in number, were then slid around therings so as to hold the piston ring expanded. The ring was then slippedover the piston.

During this operation it was usually difficult to position the stripswith reference to the rings and to slide the rings over the strips. Ihave overcome these difliculties in my improved remover by providing afinger grip and means for insuring against disengagement of the removerfrom the ring, so that by applying the fingers to the removers the ringis caused to follow their movements and it is thus readily removed fromthe piston.

In the drawings Figure 1 is a perspective view of my improved remover.

Fig. 2 is a view of my remover looking in the direction of the arrow 2in Fig. 1.

Fig. 3 shows the blank from which my improved remover is formed.

Fig. 4 is a plan view of a piston showing my removers applied to a ringthereof.

My improved remover has a base 5 and finger grip 6. A hole 7 is providedthrough the grip 6 and a groove 8 is provided in the base 5.

In the preferred form of my invention I first form a blank 9 havingrectangular holes 10 and 10. I then, in any suitable manner, bend saidblank along the lines 11 and 12 and along the lines 13 and 14 in orderto fold the portions between the lines 11 and Specification of LettersPatent.

Serial No. 441,764.

13 and between the lines 12 and 14 against.

tion of the hole 10 between the lines 11 and 13 forms one-half of thegroove 8 and the portion of the hole 10 between the lines 12 and 14 formthe'other half of said groove.

The portion of the hole 10 between the line 13 and the edge 18, togetherwith the portion of the hole 10 between the line 14 and the edge 19,forms'the hole 7.

In using my improved remover, the end 20 of the'piston ring 21 is to bepried out wardl until the base 5 of one'of my removers such as 22 can beintroduced between the inner surface of the ring and the outer surfaceof the piston 23. The remover 22 is then moved slightly in a clockwisedirection so that the base 5 of the remover 24 can be inserted betweenthe inner surface of the ring 21 and the piston 23. The removers 22 and24 are then moved slightly in a clockwise direction in order to provideroom for the base 5 of the remover 25 to be inserted between the innersurface of the piston ring 21 and the piston 23.

After the removers 22, 24 and 25 are inserted as just explained, theyare to be moved to approximately the positions shown in Fig. 4. Duringthis removal, the ring 21 will be expanded until it clears the piston 23and the fingers can then be applied to the finger grips 6 of theremovers 22, 24 and 25, and by sliding the latter over the surface ofthe piston, the ring 21 can be removed. I It is to be understood thatwhen the removers are applied to the ring as just explained, the ring isto be inserted in the hole 7 of each remover.

It is evident that the removers will bridge the grooves 26 in the pistonand prevent the entrance of the ring 21 therein.

Hence it is evident that I provide a simple, cheapand efiieient remover,capable of use on a wide variety of piston rings. It is also evidentthat my remover may be made in a wide variety of shapes while retainingthe essential features of the base 5, the finger grips 6 and the hole 7.

Patented 21, I I

3.'A piston ring remover comprising a base, a rib joining said base, agroove in said base and a hole through said rib.

4. A piston ring remover comprising a base, a finger grip on said'base,and holes in said remover for the reception of a piston ring and forinsuring engagement of said remover with said ring. V

In testimony whereof, I affix my signature. JOHN M. LAWRENCE.

